This bobbin is perfect for quilters who demand the very best! The anti-backlash spring ensures smooth, consistent stitching, while the large or double capacity bobbin means you can stitch longer without having to change bobbins. This top-quality bobbin is a must-have for any quilter's toolkit.

L size bobbin case (small bobbin) with anti-backlash spring. M (big bobbin) double capacity, bobbin case with anti-backlash spring